Estudo numérico de conectores de cisalhamento tipo Perfobond

• Autor(a) principal: Fortes, Wando Rodrigues
• Data de Publicação: 2018
• Tipo de documento: Dissertação
• Idioma: por
• Título da fonte: Biblioteca Digital de Teses e Dissertações da UERJ
• Texto Completo: http://www.bdtd.uerj.br/handle/1/11487
• topic: Civil Engineering; Mixed construction; Shear; Steel; Cement; Composite steel-concrete structures; Perforbond shear conector; Push-out; Nonlinear analysis; Finite element method; Engenharia civil; Construção mista; Cisalhamento; Aço; Cimento; Estruturas mistas aço-concreto; Conector de cisalhamento tipo Perfobond; Push-out; Análise não linear; Método dos elementos finitos; CNPQ::ENGENHARIAS::ENGENHARIA CIVIL

Composite steel-concrete structures have been applied more frequently in constructions in Brazil as well as in the world. These can be used in buildings, bridges and various types of buildings. Indeed, this increase is due to presence of an efficient and economical structural solution, thanks to optimized use of elements where the concrete contributes in the most significant in the compression and steel contributes in the tension region in the structural capacity. The assurance that these elements work together is fundamental in composite structures behavior, therefore, shear connectors are used to join steel to concrete. In order to understand the shear connectors behavior and to define their resistance and ductility, Eurocode 4 shows the parameters of experimental test called push-out. This test presents two concrete slabs joined to a steel profile through a steel connector that will be subjected to direct shear. Factors such as concrete compressive resistance, reinforcement bar diameter, geometry and tensile strength of connectors and profile affect the experimental test performance. Investigating these parameters through the composite beams numerical modeling using Perfobond connectors is the objective of this work. To validate the assumptions used in the numerical model, the results obtained were compared with the results of existing experimental tests and also compared with literature analytical formulations about the subject. A parametric analysis is presented bringing a range of results about the Perfobond connectors, aiding in the knowledge apud the influence of geometry variations, as well as variations in the materials properties. The concrete compressive strength proved to be an importante parameter, reaching a significant increase in the shear capacity. The holes diameter registered an increase in capacity up to a determined value, showing an optmized dimension. The results of reinforcements in the holes presence, the connector thickness and the useful height of slab also contributed to the increase of the strength of the connector. In addition, the parametric analysis results in terms of maximum capacity presented divergent values in comparison with the equations proposed in the literature.